Extension

Plugins are searched in the colon-separated LADSPA_PATH environment variable. If this variable is not set, it looks in /usr/lib/ladspa or /usr/local/lib/ladspa on Linux and /Library/Audio/Plug-Ins/LADSPA on Mac OS X.

If you have Ardour installed, you can find lots of plugins in /Applications/Ardour.app/Contents/Plugins

WARNING: Some LADSPA plugins might not be real-time safe, if they allocate memory at initialization.